package com.atguigu.lease.web.admin.custom.interceptor;

import com.atguigu.lease.common.context.LoginUser;
import com.atguigu.lease.common.context.LoginUserContext;
import com.atguigu.lease.common.exception.LeaseException;
import com.atguigu.lease.common.result.ResultCodeEnum;
import com.atguigu.lease.common.utils.JwtUtil;
import io.jsonwebtoken.Claims;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

/**
 * @Author :冉佳
 * @CreateTime: 2025-02-11
 * @Description: // 认真过拦截器 用来验证token是否放行
 * @Version:1.0
 **/
@Component
public class AuthenticationInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        // 拦截发送到controller的请求
        // 1. 请求合法?
        String token = request.getHeader("access_token");
        if (token == null) {
            throw new LeaseException(ResultCodeEnum.ADMIN_LOGIN_AUTH);
        } else {
            // 解析token是否合法过期?
            Claims claims = JwtUtil.parseToken(token);
            Long userId = claims.get("userId", Long.class);
            String userName = claims.get("userName", String.class);
            // 保存作用域 request 一次请求范围内有效
//            request.setAttribute("userId", userId);
//            request.setAttribute("userName", userName);
            // 用threadLocal代替request保存作用域
            LoginUserContext.setLoginUser(new LoginUser(userId, userName));
        }
        return true;
    }


    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

//        request.removeAttribute("userId");
//        request.removeAttribute("userName");
        // 删除threadlocal的数据
        LoginUserContext.remove();
    }
}
